In my personal experience trying to tell "know all's" they are wrong is the last thing I will ever do
But you could direct her to this site for advise on her growing hair out problems without offending her?
2c/3a cg 01/10/13

Hair Properties: low( first 4 inches) / high porosity, medium density, fine/medium texture Climate : hot humid summer, coastal GA

Co-wash: Suave Naturals Coconut / Everlasting Sunshine, V05
Rinse out :Tresemme Naturals Nourishing Moisture, VO5 ocean refresh
LI: SMCHM ,SMCS, JCRR,
Gel: La Looks sport, Volumax mega gel,Biosilk Rock Hard gel my HG

Love ACV , pedaheh's gelatin treatment
My hair hates everything Deva curl and Curl Keeper,